Capsule with recess passageway and system for preparing edible products including said capsules

ABSTRACT

The present invention further refers to a system for preparing edible products including a capsule (1), an apparatus for preparing edible products comprising at least one brewing device (10) presenting injection means (13) adapted so that exert a mechanic pressure upon the passageway wall (4) on a region of the passageway wall (4) opposite to the region of weakened material region (41).

FIELD OF THE INVENTION

The present invention refers to the field of the capsules for preparingedible products including aromatic beverages, such s for exampleespresso coffee, tea and similar.

The present invention further refers to a system for preparing edibleproducts based upon capsules.

BACKGROUND OF THE INVENTION

The prior art includes several solutions relating to systems forpreparing beverages, such as for example machines for preparingbeverages including espresso coffee, tea and similar, based uponcapsules containing a single portion of edible substance and provided sothat are collected inside of a brewing device. Said brewing device isadapted so as to inject a pressurized fluid flow through an upstreamside of capsule, and to collect the resulting beverage from a downstreamside of capsule.

In particular in the case of capsules provided in a substantially rigidmaterial and construction structure, despite being retained by means ofpressured engagement inside of a respective brewing device, this type ofcapsules can slip a direction transversal to the prevailing flowdirection, notably in a rotation movement around its axial axis, inparticular in case that the pressurized water injection is not done bymeans of penetration of the capsule envelope. In fact, in the case ofbrewing devices with multiple pressurized water injection outlets, thereis the need to ensure that a capsule of this type is retained inreliable manner, and eventually positioned on a given angular position,inside of a respective brewing device.

The document EP 2287090 B1 discloses a capsule comprising a containerpart with a base wall that presents a structure that forms a reducedthickness of entry wall of the pressurized fluid. In particular, saidstructure forms a continuous annular recess portion of radius R1 wherethere is provided a plurality of injection holes.

The document EP 2394932 B1 discloses a capsule similar to that of theaforementioned document, whereby in this case there is provided aweakened material region designed such that breaks at least partiallyunder the pressure of a pressurized liquid. Moreover, the body of thecapsule is made of plastic or from a plastic based material.

The document EP 2560897 B1 discloses a capsule comprising a containerpart with a base wall that presents a weakened material zone thatdefines a wall part that can be broken, and a portion of greaterthickness of said base wall around which the wall part that can bebroken turns.

The document EP 2757057 A1 discloses a capsule that presents a groovethat surrounds a central region that presents at least perforation zonewith perforations that provide an entry of hot water into the interiorof capsule.

The document WO 2015/002562 A1 submitted by the author of the presentapplication discloses a capsule comprising a lid-like element thatpresents at least one engagement groove disposed such that is surroundedby, or itself surrounds, a zone of said second construction elementadapted for fluid passage.

General Description of the Invention

The objective of the present invention is to provide a capsule in asubstantially rigid construction, for collection of a single portion ofan edible substance, in particular adapted for preparing edibleproducts, including beverages, inside of a respective brewing device,and that provides sufficient oxygen barrier and a reliable opening topressurized flow through a respective upstream oriented wall andpresenting a weakened material region.

This objective is solved by means of a capsule according to claim 1.

In particular, this objective is attained by means of a capsule thatpresents a lid-like construction element, presenting a wall part and aflow passageway wall provided as a recess region of circular shape inthe central region of said wall part and presenting a smaller wallthickness, whereby said passageway wall is delimited along at least partof a circumferential alignment by a weakened material region adapted sothat said passageway wall breaks in this zone and swivels around part ofsaid circumferential alignment.

The capsule according to the invention comprises a first constructionelement configured in a container-like form, and a second constructionelement configured in a lid-like form and adapted for entry of apressurized fluid preferentially without holing of a respective exteriorenvelope, and adapted for joint assembly so as to provide an interiorvolume for collection of a portion of at least one edible substance,including coffee, tea and similar.

It is preferred when the upstream oriented surface of capsule presents arecess region surrounding the passageway wall and an intercalary regionbetween these.

It is preferred when said recess region develops from a secondcircumferential alignment in the proximity of said passageway wall andso that results an intercalary region between said recess region andsaid passageway wall, whereby said recess region presents a recess wallthickness (e₅) that is smaller than the prevailing wall thickness (e₃₁),and bigger than the passageway wall thickness (e₄) of said passagewaywall, so that structurally reinforces the surrounding region of saidpassageway wall and provides retention surfaces for an engagementelement provided on said brewing device.

It is preferred when at least most part, preferentially the totality, ofrecess wall thickness (e₅) of said recess region develops betweentransversal planes in the proximity downstream of the transversal planesthat delimit the passageway wall thickness (e₄) of said passageway wall,so that at least most part of said recess wall thickness (e₅) isprovided downstream of said passageway wall thickness (e₄).

It is preferred when said passageway wall is delimited by a firstcircumferential alignment that presents a first diameter (d₁) smallerthan 0.35 times the diameter (d) of said flow entry wall part.

It is preferred when said recess region is delimited on a respectivedistal side by a circumferential alignment presenting a second diameter(d₂), whereby said second diameter (d₂) is at least 1.2 times bigger,preferentially at least 1.4 times bigger, and at most 2.5 times bigger,preferentially at most 2 times bigger than said first diameter (d₁).

It is preferred when the radial extension of said recess region is atleast approximately similar, preferentially bigger than 0.8 times andsmaller than 1.2 times the radial extension of said intercalary region.

It is preferred when said recess region presents a substantiallypolygonal transversal section defining at least three interior surfaces,preferentially five interior surfaces, and presenting a depth between 1and 3 mm, preferentially between 1.5 and 2.5 mm, relative to theexterior surface of said second construction element, and a radialdimension between 1 and 3 mm, preferentially between 1.5 and 2.5 mm.

It is preferred when said intercalary region presents an intercalarywall thickness (e₆) that is bigger than the passageway wall thickness(e₄) of said passageway wall and bigger than the recess wall thickness(e₅) of said recess region, preferentially is at least approximatelysimilar to said prevailing wall thickness (e₃₁), thereby structurallyreinforcing the region surrounding said weakened material region andproviding a support surface to a sealing element provided on saidbrewing device.

It is preferred when said intercalary region presents an intercalarywall thickness (e₆) that develops between planes transversal to theaxial direction upstream and downstream of the transversal planes thatdelimit said passageway wall thickness (e₄) and recess wall thickness(e₅).

It is preferred when said intercalary region comprises a seat regionthat develops in the upstream oriented surface of said flow entry wallpart along at least most part of the radial extension between saidpassageway wall and said recess region, whereby said seat region isadapted so that provides a seat surface to a sealing element provided onsaid brewing device.

It is preferred when said seat region presents a seat wall thickness(e₆₁) that is bigger than the passageway wall thickness (e₄) of saidpassageway wall, thereby improving the opening of said weakened materialregion as impinged by an upstream pressurized flow.

It is preferred when said seat region presents a seat wall thickness(e₆₁) that is bigger than the recess wall thickness (e₅) of said recessregion, preferentially presents a wall thickness that is at leastapproximately similar to said prevailing wall thickness (e₃₁).

It is preferred when said intercalary region presents a guidingprojection along said first circumferential alignment so that delimitssaid seat region relative to said passageway wall, whereby said guidingprojection projects beyond the upstream oriented exterior surface ofsaid flow entry wall part, so that provides a conduction surface that isadjacent and substantially orthogonal or oblique relative to the surfaceprovided by said seat region.

It is preferred when said passageway wall presents a projection elementthat develops upstream, whereby said projection element develops alongan extension beyond the plane defined the upstream oriented surface ofsaid flow entry wall part, so that can be impinged by a flow injectionpart of said brewing device.

It is preferred when said projection element is provided only on oneside of said passageway wall relative to said axial axis (X),preferentially in the proximity of perimeter of said passageway wall.

It is preferred when said projection element develops along an extensioncomprised between 10 to 40°, preferentially between 15 and 35°, of thecircumferential alignment that develops in at least approximatelyparallel manner relative to the circumferential alignment defined by theexterior limit of said passageway wall.

It is preferred when said projection element is provided in theproximity of the perimeter and on the side that develops in the weakenedmaterial region presenting a smaller thickness.

Another objective of the present invention is to provide a system forpreparing edible products based upon capsules, presenting capsules and abrewing device adapted so as to improve the entry of flow into saidcapsules, in particular opening of a passageway wall presenting aweakened material region.

This objective is solved according to claim 15.

It is preferred when said injection means are provided as a projectionadapted so that at least part, preferentially at least most part ofrespective extension of projection develops inside the recess formed bysaid passageway wall on said flow entry wall part, when said brewingdevice is in a closed position.

It is preferred when said injection means are provided as a projectionadapted so that exerts a mechanic pressure, preferentially in asymmetricmanner, upon part of said passageway wall, in asymmetric manner relativeto the form thereof and on a side opposite to that of a respectiveweakened material region.

It is preferred when said injection means are provided as a projectionadapted so that exerts a mechanic pressure upon a projection elementprovided so that extends upstream and above and higher than saidpassageway wall, preferentially higher than said flow entry wall part.

An associated objective is to disclose a system that provides animproved concentration of pressurized flow on a passageway wallpresenting a weakened material region.

It is preferred when said upstream actuation part presents an engagementelement provided as a protuberance that develops at a distance from saidinjection means and adapted so that engages on said recess regionprovided on said flow entry wall part, so as to thereby retain saidcapsule with relation to a sealing element provided so that surroundssaid injection means.

It is preferred when said engagement element is provided so thatdevelops along an extension of arch of circumference that is smallerthan 20°, preferentially smaller than 15°, and bigger than 3°,preferentially bigger than 5°.

It is preferred when said sealing element is provided with a ring shapeand adapted so that sits on the seat region of said intercalary regionbetween said passageway wall and recess region.

It is preferred when said sealing element is provided as a projectionthat develops along the axial direction with a smaller extension thanthe extension of said engagement element.

DESCRIPTION OF THE FIGURES

The present invention shall be hereinafter explained in greater detailbased upon the description of preferred embodiments thereof and theFigures attached.

The Figures show, in simplified schematic representations:

FIG. 1: plan view (top) and side cut (bottom) of a capsule (1) accordingto prior art;

FIG. 2: plan view (top) and side cut (bottom) of a capsule (1) accordingto present invention;

FIG. 3: plan view of a first embodiment of a second construction element(3) in a capsule (1) according to the invention;

FIG. 4: side cut view (top) and respective detail of central region(bottom) of second construction element (3) according to FIG. 3;

FIG. 5: plan view of a second embodiment of second construction element(3) in a capsule (1) according to the invention;

FIG. 6: side cut view (top) and respective detail of central region(bottom) of second construction element (3) according to FIG. 5;

FIG. 7: plan view of a third embodiment of second construction element(3) in a capsule (1) according to the invention;

FIG. 8: side cut view (top) and respective detail of central region(bottom) of second construction element (3) according to FIG. 7;

FIG. 9: plan view of a fourth embodiment of second construction element(3) in a capsule (1) according to the invention;

FIG. 10: side cut view (top) and respective detail of central region(bottom) of second construction element (3) according to FIG. 9;

FIG. 11: side cut views of a brewing device (10) open (left-hand side)and closed (right-hand side) and capsule (1) according to the presentinvention;

FIG. 12: front view of the upstream actuation part (11) of a brewingdevice (10) comprised in a system according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

As can be observed in FIG. 1, a capsule of the type of capsule (1)includes a first construction element (2) configured in a container-likeshape and a second construction element (3) configured in a lid-likeshape. Said first and second construction elements (2, 3) are providedas substantially rigid, for example in a plastic material, and adaptedfor joint assembly along a common central axis (X) of said capsule (1),thereby providing an interior volume adapted for collection of a singleportion of at least one edible substance, such as for example roastedground coffee beans.

Optionally, there can be provided a recess region (5) on theupstream-oriented side, of annular shape and eventually presenting aweakened material region.

As can be observed in FIG. 2, in the case of a capsule (1) according tothe present invention, a second construction element (3) presents a flowentry wall part (31) that presents a disk-like general shape and apassageway wall (4) provided as a region that is recessed relative tothe exterior surface planes of said flow entry wall part (31).

In the case of a first embodiment of said capsule (1), said passagewaywall (4) presents a passageway wall thickness (e₄) that corresponds to areduction of thickness of the prevailing wall thickness (e₃₁) of saidflow entry wall part (31), provided in a region of circular shape and onboth sides of said flow entry wall part (31), so that said passagewaywall (4) develops in a intercalary plane between the exterior surfacesoriented upstream and downstream of said flow entry wall part (31).Moreover, it is preferred when at least the downstream surroundingwalls, preferentially also the upstream surrounding walls of saidpassageway wall (4), develop along an oblique direction relative to thedirection of said axial axis (X).

Said passageway wall part (4) presents a weakened material region (41)that develops along at least most part of said first circumferentialalignment and that is adapted so that breaks under a given upstreampressure.

The second construction element (3) of said capsule (1) further presentsa recess region (5) provided on the upstream oriented side of said flowentry wall part (31), whereby said recess region (5) develops from asecond circumferential alignment in the proximity of said passagewaywall (4) and so that results an intercalary region (6) between saidrecess region (5) and said passageway wall (4), whereby said recessregion (5) presents a recess wall thickness (e₅) that is smaller thanthe prevailing wall thickness (e₃₁), and bigger than the passageway wallthickness (e₄) of said passageway wall (4), so that said passageway wall(4) is deflected under the pressurized flow so that breaks said weakenedmaterial region (41).

The second construction element (3) of said capsule (1) further presentsan intercalary region (6) that presents an intercalary wall thickness(e₆) that is bigger than the passageway wall thickness (e₄) of saidpassageway wall (4) and bigger than the recess wall thickness (e₅) ofsaid recess region (5), preferentially is at least approximately similarto said prevailing wall thickness (e₃₁), thereby improving thetransmission of structural resistance from said recess region (5) and tosaid weakened material region (41).

According to an inventive aspect of a capsule (1) according to thepresent invention, said passageway wall (4) presents a passageway wallthickness (e₄) that is smaller than said prevailing wall thickness(e₃₁), and respective weakened material region (41) is provided by meansof localized reduction of said passageway wall thickness (e₄), so thatresults a region of weakened thickness (e₄₁) along said firstcircumferential alignment, thereby improving the opening of saidpassageway wall (4) when impinged by an upstream pressurized flow—seeFIGS. 3 and 4.

Moreover, said passageway wall (4) is provided as a reduction of saidprevailing wall thickness (e₃₁) in a region of circular shape andcentred relative to the centre (X) of said flow entry wall part (31),and said weakened material region (41) is provided between saidprevailing wall thickness (e₃₁) and said passageway wall thickness (e₄).

According to an inventive aspect, said flow passageway wall (4) presentsa projection element (7) that extends upstream, whereby said projectionelement (7) develops along an extension beyond the plane defined by theupstream oriented surface of said entry wall part (31), so that saidprojection element (7) can be impinged by a flow injection part (13) ofsaid brewing device (10) as the latter moves in the closing movement,and thereby generates a deflection moment upon said weakened materialregion (41)—see FIGS. 3 to 10.

It is thus provided an additional element of mechanic pressure upon theweakened material region (41) of said passageway wall (4), therebycontributing to a reliable opening thereof.

It is preferred when said projection element (7) is provided only on oneside of said flow passageway wall (4) relative to said axial axis (X),preferentially in the proximity of perimeter of said flow passagewaywall (4).

It is further preferred when said projection element (7) develops alongan angular extension comprised between 10 to 40°, preferentially between15 to 35°, of a circumferential alignment that develops in at leastapproximately manner relative to the circumferential alignment definedby the exterior limit of said passageway wall (4).

It is further preferred when said projection element (7) is provided inthe proximity of perimeter and on one side where develops said weakenedmaterial region (41) presenting a smaller wall thickness.

According to a preferred embodiment—see FIGS. 3 to 10—it is preferredwhen said passageway wall (4) presents a passageway wall thickness (e₄)that corresponds to a thickness reduction of prevailing wall thickness(e₃₁) of said flow entry wall part (31), provided in a region ofcircular shape and on both side of said flow entry wall part (31), sothat said passageway wall (4) develops in an intercalary plane betweenupstream and downstream oriented exterior surfaces of said flow entrywall part (31).

It is further preferred when said passageway wall (4) is provided closerto the upstream oriented surface than from the downstream orientedsurface of said flow entry wall part (31).

According to an inventive aspect—see FIGS. 7 to 10 —said weakenedmaterial region (41) is provided as the region between two recesses inopposite sides of said passageway wall (4), whereby said recessespresents at least one of different shape and different dimensionrelative to the remaining passageway wall (41).

It is preferred when said weakened material region (41) is provided asthe region between two recesses in opposite sides of said passagewaywall (4), developing along a circumferential alignment of at leastapproximately similar dimension, whereby said recesses distant from eachother in the closest region between each other in the valuecorresponding to said weakened thickness (e₄₁).

It is preferred when said weakened material region (41) is provided asthe region between two recesses in opposite sides of said passagewaywall (4), whereby said recesses presents different depths relative tothe surface planes of the respective sides of said passageway wall (4),and said maximum depths develop in different projections along planesparallel to said axial axis (X).

It is further particularly preferred when said weakened material region(41) is provided as the region between two recesses in opposite sides ofsaid passageway wall (4), whereby the recesses disposed on the upstreamside develop at least partially on a more proximal region than therecesses disposed on the upstream oriented side, with reference to saidaxial axis (x) of said passageway wall (4).

According to another inventive aspect—see FIGS. 9 to 10—, said weakenedmaterial region (41) is provided as the region between two recesses inopposite sides of said passageway wall (4) and presenting at least oneoblique surface relative to the direction of said axial axis (X),whereby in the region closest to each other said recesses configure twosurfaces oblique relative to the direction of said axial axis (X), andthat develop at least approximately parallel along a preferentialrupture extension that presents said weakened thickness (e₄₁) anddevelops in oblique manner relative to the direction of said axial axis(X).

It is preferred when said passageway wall (4) is surrounded downstreamby a wall that extends beyond the plane defined by the wall thickness(e₃) of said flow entry wall part (31) so that deflects the pressurizedflow through the weakened material region (41), and in that at leastsaid downstream surrounding wall, preferentially also an upstreamsurrounding wall of said passageway wall (4), develop along an obliquedirection relative to the direction of said axial axis (X).

It is preferred when said weakened material region (41) is providedalong at least most part, preferentially the totality, of acircumferential perimeter and presents a first (e₄₁) and a second (e₄₂)weakened thickness, whereby said first weakened thickness (e₄₁) issmaller than said second weakened thickness (e₄₂).

It is further preferred when said first weakened thickness (e₄₁)develops along a bigger extension than said second weakened thickness(e₄₂).

FIG. 11 represents a system according to the present inventioncomprising a capsule (1) adapted for containing an edible substance, forexample roasted and ground coffee beans, and a brewing device (10)adapted for being part of an apparatus for preparing edible products,such as for example a coffee machine.

Said brewing device (10) presents an upstream part (11) adapted forinjection of pressurized flow, and a downstream part (12) adapted forcollection of the resulting edible product.

As one can observe in FIG. 12, the upstream part (11) presents, alongthe radial direction, injection means (13), a sealing element (14)provided in the proximity of said injection means (13) and further anengagement element (15) provided adjacent to said sealing element (14).

According to an inventive aspect, said injection means (13) are providedas a projection extending downstream and adapted so that exerts amechanic pressure upon part of said passageway wall (4) in the proximityof the weakened material region (41), so that said passageway wall (4)swivels downstream around a region of said passageway wall (4) that isopposite to said weakened material region (41) as a result of saidmechanic pressure—see drawing on the right-hand side of FIG. 11.

Moreover, said injection means (13) are provided as a projection adaptedso that at least part, preferentially at least most part of respectiveextension of projection develops inside of the recess formed by saidpassageway wall on said flow entry wall part (31), when the brewingdevice (10) is in a closed position.

It is preferred when said injection means (13) are provided as aprojection adapted so that exerts a mechanic pressure, preferentially inasymmetric manner, upon part of said passageway wall (4).

It is further preferred when said injection means (13) are provided as aprojection adapted so that exerts a mechanic pressure upon a projectionelement (7) provided so that extends upstream above and higher than saidpassageway wall (4)—see FIGS. 3 to 10.

Lisbon, Dec. 27, 2017

1. A capsule (1) for preparing an edible product on a brewing device(10), and presenting: a first construction element (2) configured in acontainer-like form and adapted so as to provide a collection volume fora single portion of an edible substance, and a second constructionelement (3) configured in a circular lid-like form, and adapted so as toconfine said collection volume of first construction element (2) and asto provide an entry flow passageway to the interior of said firstconstruction element (2), whereby said second construction element (3)comprises a flow entry wall part (31) that presents a disk-like generalwith a prevailing wall thickness (e₃₁) between two plane transversalrelative to an axial axis (X) of said wall part (31), whereby said flowentry wall part (31) is provided in a rigid material, whereby said flowentry wall part (31) comprises a passageway wall (4) provided with acircular shape delimited by a first circumferential alignment anddisposed centred relative to an axial axis (X) of said capsule (1),whereby said flow passageway wall (4) presents a weakened materialregion (41) that develops along at least most part along at least mostpart of said first circumferential alignment and that is adapted so thatbreaks under a given upstream flow pressure, said capsule (1) beingcharacterized in that said passageway wall (4) presents a passagewaywall thickness (e₄) that is smaller than said prevailing wall thickness(e₃₁), and respective weakened material region (41) is provided by meansof a localized reduction of said passageway wall thickness (e₄), so thatresults a region with a weakened thickness (e₄₁) along said firstcircumferential alignment, thereby improving the opening of saidpassageway wall (4) when impinged by a pressurized upstream flow.
 2. Thecapsule (1) according to claim 1, characterized in that said passagewaywall (4) is provided as a reduction of said prevailing wall thickness(e₃₁) on a region of circular shape and disposed centred relative tosaid entry wall part (31), and in that said weakened material region(41) is provided in a region presenting said passageway wall thickness(e₄) in the proximity of a region presenting said prevailing wallthickness (e₃₁).
 3. The capsule (1) according to claim 1, characterizedin that said passageway wall (4) presents a passageway wall thickness(e₄) that corresponds to a thickness reduction of said prevailing wallthickness (e₃₁) of said entry wall part (31), provided on a region ofcircular shape and on both sides of said entry wall part (31), so thatsaid passageway wall (4) develops on an intercalary plane between theexterior upstream and downstream oriented surfaces of said entry wallpart (31), and in that said passageway wall (4) is provided disposedcloser to the upstream oriented surface than to the downstream orientedsurface of said entry wall part (31).
 4. The capsule (1) according toclaim 1, characterized in that said passageway wall (4) is surroundeddownstream by a wall that extends beyond the plane defined by the wallthickness (e₃) of said entry wall part (31) so that deflects thepressurized flow through the weakened material region (41), and in thatat least said downstream surrounding wall, preferentially also anupstream surrounding wall of said passageway wall (4), develop along anoblique region relative to the direction of said axial axis (X).
 5. Thecapsule (1) according to claim 1, characterized in that said weakenedmaterial region (41) is provided along at least most part,preferentially the totality, of a circumferential perimeter and presentsa first (e₄₁) and a second (e₄₂) weakened thickness, whereby said firstweakened thickness (e₄₁) is smaller than said second weakened thickness(e₄₂).
 6. The capsule (1) according to claim 1, characterized in thatsaid first weakened thickness (e₄₁) is comprised between 0.05 and 0.20,preferentially between 0.10 and 0.15, of said passageway wall thickness(e₄) of said passageway wall (4).
 7. The capsule (1) according to claim1, characterized in that said weakened material region (41) correspondsto the region between a first recess provided on the upstream orientedside of said passageway wall (4), and a second recess provided on thedownstream oriented side of said passageway wall (4), whereby each oneof said recesses develops along a transversal direction along acircumferential alignment and develops in an axial direction so thatsaid recesses distance, in the nearest region between themselves, in thevalue corresponding to said weakened thickness (e₄₁).
 8. The capsule (1)according to claim 1, characterized in that said weakened materialregion (41) is provided as the region between two recesses in mutuallyopposing sides of said flow passageway wall (4), whereby said recessespresent at least one of different shape and different dimension.
 9. Thecapsule (1) according to claim 1, characterized in that said weakenedmaterial region (41) is provided as region extending between tworecesses on said passageway wall (41) that present different maximumdepths relative to the surface planes of respective sides of saidpassageway wall (4).
 10. The capsule (1) according to claim 1,characterized in that said weakened material region (41) is provided asthe region extending between two recesses on said passageway wall (4)that present maximum depths that develop in different planes at leastapproximately parallel to said axial axis (X).
 11. The capsule (1)according to claim 1, characterized in that said weakened materialregion (41) is provided as the region between two recesses disposed inopposing side of said passageway wall (4) and presenting at least oneoblique surface relative to the direction of said axial axis (X),whereby in the region closest to each other said recesses configure twosurfaces oblique relative to said axial axis (X), and that develop atleast approximately parallel along a preferential rupture extension thatpresents said weakened thickness (e₄₁) and that develops in obliquemanner relative to the direction of said axial axis (X).
 12. The capsule(1) according to claim 1, characterized in that said weakened materialregion (41) is provided as the region between two recesses on oppositesides of said passageway wall (4), whereby recesses disposed on theupstream side develop at least partially in a more proximal region thanrecesses disposed on the downstream oriented side, with reference tosaid axial axis (x).
 13. The capsule (1) according to claim 1,characterized in that said weakened material region (41) presents afirst weakened thickness (e₄₁) that develops along an arch ofcircumference comprised between 348° and 325°, preferentially between345° and 328°.
 14. The capsule (1) according to claim 1, characterizedin that presents at least one of: further presents a recess region (5)provided on the upstream oriented side of said flow entry wall part(31), whereby said recess region (5) develops from a secondcircumferential alignment in the proximity of said passageway wall (4)and so that defines an intercalary region (6) between said recess region(5) and said passageway wall (4), whereby said recess region (5)presents a recess wall thickness (e₅) that is smaller than theprevailing wall thickness (e₃₁), and bigger than the passageway wallthickness (e₄) of said passageway wall (4), so that said passageway wall(4) is deflected when the pressurized flow breaks said weakened materialregion (41), an intercalary region (6) that presents an intercalary wallthickness (e₆) that is bigger than the passageway wall thickness (e₄) ofsaid passageway wall (4) and bigger than the wall thickness of saidrecess wall (e₅) of said recess region (5), preferentially is at leastapproximately similar to said prevailing wall thickness (e₃₁), therebyimproving the transmission of structural resistance from said recessregion (5) and into said weakened material region (41).
 15. A system forpreparing edible products comprising: a capsule (1) adapted forcontaining a single portion of an edible substance, in particular acapsule (1) according to claim 1, and an apparatus for preparing edibleproducts based upon said capsule (1) and including at least one brewingdevice (10) that presents two actuation parts (11, 12), whereby saidcapsule (1) presents an upstream oriented wall part (31) that presents apassageway wall (4) of circular shape and disposed centred relative toan axial axis (X) of said capsule (1), and successively surrounded by anintercalary region (6) and a recess region (5), whereby said actuationparts (11, 12) are adapted so as to collect said capsule (1), and atleast one of said actuation parts (11, 12) can be moved relative to theother so as to engage with the exterior envelope of said capsule (1),whereby an upstream actuation part (11) comprises injection means (13)adapted for impinging a pressurized fluid flow upon said passageway wall(4) provided on an upstream side of said capsule (1), whereby adownstream actuation part (12) comprises discharge means adapted forcollecting a beverage from the downstream side of said capsule (1), saidsystem being characterized in that said injection means (13) areprovided as a projection developing downstream and adapted so thatexerts a mechanic pressure upon part of said passageway wall (4) in theproximity of said weakened material region (41), so that said passagewaywall (4) swivels downstream around a region of said passageway wall (4)opposite to said weakened material region (41) as a result of saidmechanic pressure.